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Submission #988734

# Submission time Handle Problem Language Result Execution time Memory
988734 2024-05-25T19:50:29 Z canadavid1 Alternating Heights (CCO22_day1problem1) C++17
10 / 25
 1000 ms 12336 KB 
#include <iostream>
#include <vector>
#include <bitset>
#include <array>
#include <unordered_set>
constexpr int MAX_K = 3000;
int main()
{
    std::cin.tie(0)->sync_with_stdio(0);
    // O(N^2 + min(N,Q)KlogN)
    int N,K,Q;
    std::cin >> N >> K >> Q;
    std::vector<int> A(N);
    for(auto& i : A) std::cin >> i;
    for(auto& i : A) i--;

    std::vector<std::pair<int,int>> xy(Q);
    for(auto&[x,y] : xy) std::cin >> x >> y;
    std::unordered_set<int> xs;
    for(auto&[x,y] : xy) {x--,y--;xs.insert(x);}

    std::vector<int> works_max(N);
    for(int x : xs)
    {
        int l = x;
        int r = N;
        std::vector<std::vector<int>> reach[2] = {std::vector<std::vector<int>>(K),std::vector<std::vector<int>>(K)};
        
        while(r-l>1)
        {
            int m = (r+l)/2;
            for(int i = l+1; i <= m; i++)
            {
                reach[i%2][A[i]].push_back(A[i-1]);
                reach[!(i%2)][A[i-1]].push_back(A[i]);
            }
            
            bool b = 1;
            for (const auto& g : reach)
            {
                std::vector<int> inct(K);
                for(auto& i : g)
                for(auto& j : i) inct[j]++;
                std::vector<int> S;
                for(int i = 0; i < K; i++) if(!inct[i]) S.push_back(i);
                std::vector<bool> seen(K);
                while(S.size())
                {
                    auto n = S.back(); S.pop_back();
                    seen[n] = true;
                    for(auto ne : g[n])
                    {
                        inct[ne]--;
                        if(!inct[ne]) S.push_back(ne);
                    }
                }
                for(auto i : seen) b &= i;
            }
            if(b) l = m;
            else
            {
                r = m;
                for(int i = l+1; i <= m; i++)
                {
                    reach[i%2][A[i]].pop_back();
                    reach[!(i%2)][A[i-1]].pop_back();
                }
            }
        }
        works_max[x] = l;
        // bool g = 1;
        // for(int y = x+1; y < N; y++,g = !g)
        // {
        //     auto a = A[y];
        //     auto p = A[y-1];
        //     ltgt[g][a] |= ltgt[g][p];
        //     ltgt[g][a][p] = true;
        //     for(auto& i : ltgt[g]) if(i[a]) i |= ltgt[g][a]; 
        //     bool b = 0;
        //     for(int i = 0; i < K; i++) if((ltgt[0][i]&ltgt[1][i]).any() || ltgt[0][i][i] || ltgt[1][i][i]) b=1;
        //     if(b) break;
        //     works_max[x] = y;
        // }
    }
    // for(auto i : works_max) std::cerr << i << "\n";
    for (auto[x,y] : xy)
    {
        std::cout << (works_max[x]>=y ? "YES" : "NO") << "\n";
    }
    

}

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 205 ms 11296 KB Output is correct
2 Correct 191 ms 11356 KB Output is correct
3 Correct 194 ms 11372 KB Output is correct
4 Correct 111 ms 11088 KB Output is correct
5 Correct 123 ms 11344 KB Output is correct
6 Correct 218 ms 11272 KB Output is correct
7 Correct 192 ms 11396 KB Output is correct
8 Correct 202 ms 11360 KB Output is correct
9 Correct 215 ms 11348 KB Output is correct
10 Correct 326 ms 11864 KB Output is correct
11 Correct 573 ms 12336 KB Output is correct
12 Correct 408 ms 12260 KB Output is correct

Subtask #2
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 133 ms 11352 KB Output is correct
2 Correct 136 ms 11344 KB Output is correct
3 Correct 134 ms 11348 KB Output is correct
4 Correct 117 ms 12116 KB Output is correct
5 Correct 131 ms 11272 KB Output is correct
6 Correct 137 ms 11136 KB Output is correct
7 Correct 135 ms 11344 KB Output is correct
8 Correct 137 ms 11348 KB Output is correct
9 Correct 140 ms 11600 KB Output is correct
10 Correct 174 ms 12128 KB Output is correct
11 Correct 153 ms 12112 KB Output is correct
12 Correct 1 ms 348 KB Output is correct

Subtask #3
0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 789 ms 764 KB Output is correct
3 Correct 801 ms 800 KB Output is correct
4 Correct 26 ms 760 KB Output is correct
5 Correct 1 ms 344 KB Output is correct
6 Correct 2 ms 484 KB Output is correct
7 Correct 543 ms 720 KB Output is correct
8 Correct 915 ms 808 KB Output is correct
9 Execution timed out 1035 ms 812 KB Time limit exceeded
10 Halted 0 ms 0 KB -

Subtask #4
0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 205 ms 11296 KB Output is correct
2 Correct 191 ms 11356 KB Output is correct
3 Correct 194 ms 11372 KB Output is correct
4 Correct 111 ms 11088 KB Output is correct
5 Correct 123 ms 11344 KB Output is correct
6 Correct 218 ms 11272 KB Output is correct
7 Correct 192 ms 11396 KB Output is correct
8 Correct 202 ms 11360 KB Output is correct
9 Correct 215 ms 11348 KB Output is correct
10 Correct 326 ms 11864 KB Output is correct
11 Correct 573 ms 12336 KB Output is correct
12 Correct 408 ms 12260 KB Output is correct
13 Correct 133 ms 11352 KB Output is correct
14 Correct 136 ms 11344 KB Output is correct
15 Correct 134 ms 11348 KB Output is correct
16 Correct 117 ms 12116 KB Output is correct
17 Correct 131 ms 11272 KB Output is correct
18 Correct 137 ms 11136 KB Output is correct
19 Correct 135 ms 11344 KB Output is correct
20 Correct 137 ms 11348 KB Output is correct
21 Correct 140 ms 11600 KB Output is correct
22 Correct 174 ms 12128 KB Output is correct
23 Correct 153 ms 12112 KB Output is correct
24 Correct 1 ms 348 KB Output is correct
25 Correct 1 ms 344 KB Output is correct
26 Correct 789 ms 764 KB Output is correct
27 Correct 801 ms 800 KB Output is correct
28 Correct 26 ms 760 KB Output is correct
29 Correct 1 ms 344 KB Output is correct
30 Correct 2 ms 484 KB Output is correct
31 Correct 543 ms 720 KB Output is correct
32 Correct 915 ms 808 KB Output is correct
33 Execution timed out 1035 ms 812 KB Time limit exceeded
34 Halted 0 ms 0 KB -